Configure Postfix, Dovecot for SSL on Linux CentOS4.3 

Secure Sockets Layer (SSL), are cryptographic protocols that provide security and data integrity for communications over TCP/IP networks such as the Internet. TLS and SSL encrypt the segments of network connections at the Transport Layer end-to-end. 

How to configure postfix and dovecot for SSL on Linux Platform?

–improvement for smtp over ssl authentication
#-issue server certifcate
# cd /usr/share/ssl/certs
# make mail.pem
# Country Name:US
# Province Name:NY
# Locality Name:Manhattan
# Organization Name :CIS
# Organization Unit Name:
# Common Name:mail.configureinstallsetup.com
# Email Address:admin@configureinstallsetup.com

# –>created as /isr/share/ssl/certs/mail.pem
use certificates of SSL of httpd

-configure postfix, openssl auth
in /etc/postfix/main.cf add
smtpd_user_tls = yes
smtpd_tls_cert_file = /usr/local/apache2/conf/ssl.crt/server.crt
smtpd_tls_key_file = /usr/local/apache2/conf/ssl.key/server.key
smtpd_tls_session_cache_database = btree:/etc/postfix/smtpd_scache
broken_sasl_auth_clients = yes #for outlook express

in /etc/postfix/master.cf
smtp inet n - n - - smtpd
-o smtpd_tls_wrappermode=yes -o smtpd_sasl_auth_enable=yes #space is necessary at the first column
#-o smptd_client_restrictions=permit_sasl_… #don’t remove # as a comment line
tlsmagr unix - - n 1000? 1 tlsmgr

-registration of smtps
in /etc/services add
smtps 465/tcp #SMTP over SSL

-configure dovecot, openssl aut
in /usr/local/etc/dovecot.conf
protocols = imap imaps pop3 pop3s
disable_plaintext_auth = yes
ssl_disable = no
ssl_cert_file = /usr/local/apache2/conf/ssl.crt/server.crt
ssl_key_file = /usr/local/apache2/conf/ssl.key/server.key

#it works by telnet mail.configureinstallsetup.com 465, though does not work by outlook express.